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In XCode, I saw the template for Java but I could not get the output of my program written in one of the Java templates (Java Application). Does Xcode supports Java compilation? If it supports it, should I add any thing to my program to run? It is just a “Hello World” program.
XCode does support Java development.
I’m not sure if you’re asking for this specific to the iPhone – it’s listed in the tags but not mentioned anywhere in your question. The iPhone only supports program development in Objective-C – to get a Java program to run on the iPhone you’d have to run it through a cross-compiler to turn your Java program into an Objective-C program. XMLVM is usually the cross-compiler mentioned in regards to this.
So, if you’re developing a regular Java app that’s going to run as a desktop or web app hosted on a Linux/Windows/Mac computer – XCode will do that. If you’re trying to develop a Java app for the iPhone, you’ll have to develop the app in Java (using XCode of otherwise), run it through a cross-compiler to produce an Objective-C program (not something that XCode does), and then deploy that to the iPhone.